Trust the energy
During a Kundalini Activation Process ceremony, you will first lie down on a mat, close your eyes and relax your whole body. Some music will then be played, and the facilitator may touch or press your chakras or meridian points. Surrender to the process without expectations. Whatever arises, let it arise and be expressed.
Examples of experiences
Laying still, but feel energy running through your body
Activation of your third eye, seeing lights or images, going on astral journeys, visions
Anger, sadness, fear, laughter, joy. Do not suppress this, feel it and it will be released. You might want to scream, cry or laugh, all emotional release is welcomed
Body movements, stretches, yoga poses, shaking, mudras... pay attention to where you are feeling it and how your body wants to move without letting your mind interfere
You can experience a complete state of bliss. Non duality is a experience of oneness with all things and beings. A complete identification with all and nothing around you. The feeling of disappearing completely in the moment and in a state of being. You don't see the sea, you are the sea. You don't listen to the music, you are the music. You are all. And you are nothing. There is a completion of awareness and experience, where you are the experience itself.
A side note
Everyone is more or less sensitive to this energy, It is just a matter of time, some people need more time than others. The more KAP you do, the deep it goes, each session is different. It is possible that 10%-20% might not feel anything in the session. But even they still report life changing experiences in their every day life.
Another side note
Below you will find a video. This beautiful official explanation of KAP will give you inside in what is possible, but might also create expectations or fear that you have to do something you don't want or can't. For a first timer in KAP i would recommend to see the video after your first session. If you can't stand the curiosity: All in life is a choice, so feel free to click.
Just promise me: Don't go into expectations. When desire wins over wonder, we lose the most.